In the package definition the call to the command 'git' is substituted with
the full path to the git executable. This change causes the mix formatting tool
to complain that the line is too long. This workaround reformats the file
after the substitution is made.

--- a/Makefile
+++ b/Makefile
@@ -213,6 +213,7 @@
 TEST_ERLS = $(addprefix $(TEST_EBIN)/, $(addsuffix .beam, $(basename $(notdir $(wildcard $(TEST_ERL)/*.erl)))))
 
 test_formatted: compile
+	bin/elixir bin/mix format lib/mix/lib/mix/scm/git.ex
 	bin/elixir bin/mix format --check-formatted
 
 test_erlang: compile $(TEST_ERLS)
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<div class='path'>path: <a href='/guix/log/?id=1f6a73ee6b94e5798c14fe86dc012c0e8505d451'>root</a>/<a href='/guix/log/.dir-locals.el?id=1f6a73ee6b94e5798c14fe86dc012c0e8505d451'>.dir-locals.el</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/.dir-locals.el?id=1f6a73ee6b94e5798c14fe86dc012c0e8505d451&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2016-10-04 16:37:59 +0200'>2016-10-04</span></td><td><a href='/guix/commit/.dir-locals.el?id=afb325d84227fe84adda60c03a9015d7473c0b85'>Set Emacs config variable sentence-end-double-space.</a><span class='msg-avail'>...</span></td><td>Hartmut Goebel</td></tr>